Effect of recycled coarse aggregate and foundry sand on the properties of self-compacting concrete

Abstract

In this paper, the possibility of utilising foundry sand and recycled coarse aggregate (RCA) obtained from a ready-mix concrete plant for making self-compacting concrete (SCC) was evaluated. In this experiment, 25 concrete mixes were made in which the substitution of RCA was 0, 25, 50, 75 and 100% as coarse aggregate and substitution of foundry sand was 0, 10, 15, 20 and 25% as fine aggregate. The cement content, water and silica fume were kept constant for all 25 mixes. The effects of foundry sand and RCA on the fresh properties of concrete and the hardened properties of SCC were evaluated. The results of the investigation showed that the hardened properties of concrete with 20% foundry sand were significantly improved when compared to conventional concrete. However, the hardened properties of the SCC with 100% RCA were poorer than for conventional concrete with 100% natural coarse aggregate. Strength decreases with the increase in percentage of substitution of RCA. It was found that an M20 grade of structural SCC was achieved with 75% substitution of RCA.

Optimum mix design for quarry waste-based masonry blocks with alkali-activated rice husk ash and eggshell ash as a binder

“…However, compared to concrete produced using an equivalent quantity of river sand, concrete constructed using quarry waste has enhanced strength (Donza, Cabrera et al 2002). Such a pattern was documented in the existing scholarly literature about self-compacting concrete (Nanthagopalan and Santhanam 2011, Benabed, Kadri et al 2012, Mahakavi, Chithra et al 2019. According to Sundaralingam et al (Sundaralingam, Peiris et al 2022), it has been said that a greater water-to-cement ratio is necessary to maintain the appropriate workability of the cement-sand mortar.…”

Glass and Construction Wastes in Sustainable Geopolymer Systems

“…V Silva, De Brito, and Dhir 2014;Pereira-de-Oliveira et al 2014;Señas, Priano, and Marfil 2016;Laneyrie et al 2016;Kapoor, Singh, and Singh 2016;N. Singh and Singh 2016a;Mahakavi, Chithra, and Kavitha 2018). However, results have been varied and, in some cases, there have been disagreements among them.…”

An Experimental Study of Dynamic Compression Performance of Self-Compacting Concrete

“…Self-compacting concrete (SCC) is a kind of high-performance concrete compacted and formed by its weight without compaction. With advantages such as high homogeneity, high compactness, and simplification of construction, it has been widely used and popularized [ 1 , 2 , 3 ]. Under the service life of a concrete structure, it is not only subjected to static load but also may be subjected to dynamic load.…”